May Weather in Greeley, United States

Last updated: June 24, 2025

In May, the average temperature in Greeley, United States hovers around 15°C (60°F), making it a delightful time to visit. Expect a minimum chill of -1°C (31°F) and the possibility of sweltering days reaching up to 35°C (95°F). Be prepared for some rain, with a total precipitation of 144 mm (5.7 in) spread over 13 days. The air carries an average humidity level of 80%, adding to the unique atmosphere of this vibrant locale.

May Temperature in Greeley

In May in Greeley, the average temperature is 15°C (60°F). Maximums can reach 35°C (95°F), while minimums can drop as low as -1°C (31°F). Be prepared for a wide range of temperatures when traveling, so pack accordingly for both warmth and cooler conditions.

May Weather in Greeley: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Greeley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greeley, May typically has an average temperature of 15°C (60°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Greeley generated using information from the Copernicus Climate Change Service.

May Precipitation in Greeley

In Greeley in May, the precipitation amount is 144 mm (5.7 in) spread over 13 days.

May Precipitation Trends in Greeley

The chart displays monthly precipitation patterns in Greeley, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Greeley, May typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Greeley

In Greeley in May humidity is 80%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can make even the simplest stroll feel like a workout, leaving travelers yearning for a refreshing breeze or shade to escape the weight of the air.

May Average Humidity in Greeley

This chart illustrates the average monthly humidity levels in Greeley, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Greeley is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Greeley

In Greeley in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Greeley.

Maximum UV Index Levels in Greeley for May

The chart shows the monthly maximum UV Index (UVI) for Greeley in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Greeley typically reaches 10, which falls under the very high exposure category.

Data source: Greeley May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Greeley Compares to Other Months

Weather in Greeley varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Greeley, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Greeley, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	24 mm (0.9 inches)	73%	moderate
February Weather	-4°C (25°F)	20 mm (0.8 inches)	81%	moderate
March Weather	4°C (39°F)	84 mm (3.3 inches)	69%	high
April Weather	9°C (48°F)	61 mm (2.4 inches)	71%	very high
May Weather	15°C (60°F)	144 mm (5.7 inches)	80%	very high
June Weather	23°C (74°F)	89 mm (3.5 inches)	83%	extreme
July Weather	25°C (77°F)	77 mm (3.0 inches)	84%	very high
August Weather	23°C (73°F)	91 mm (3.6 inches)	84%	very high
September Weather	20°C (68°F)	57 mm (2.3 inches)	77%	very high
October Weather	10°C (50°F)	85 mm (3.3 inches)	72%	high
November Weather	4°C (39°F)	22 mm (0.9 inches)	80%	moderate
December Weather	-1°C (30°F)	42 mm (1.6 inches)	79%	moderate